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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F12%3A00375412%21RIV13-GA0-67985858
rdf:type
skos:Concept n11:Vysledek
dcterms:description
Infinite dilution 29Si and 13C NMR chemical shifts were determined from concentration dependences in dilute chloroform and acetone solutions of para substituted silylated phenols, 4 R C6H4 O –SiR'2R'' (R = Me, MeO, H, F, Cl, NMe2, NH2, and CF3) where the silyl part included groups of different sizes: dimethylsilyl (DMS, R' = Me, R'' = H), trimethylsilyl (TMS, R' = R'' = Me), tert. butyldimethylsilyl (TBDMS, R' = Me, R'' = CMe3) and tert. butyldiphenylsilyl (TBDPS, R' = C6H5, R'' = CMe3). Dependences of the silicon and C-1 carbon chemical shifts on Hammett substituent constants are discussed. It is shown that substituent sensitivity of these chemical shifts is reduced by association with chloroform, the reduction being proportional to solvent accessible surface of the oxygen atom in the Si-O-C link. Infinite dilution 29Si and 13C NMR chemical shifts were determined from concentration dependences in dilute chloroform and acetone solutions of para substituted silylated phenols, 4 R C6H4 O –SiR'2R'' (R = Me, MeO, H, F, Cl, NMe2, NH2, and CF3) where the silyl part included groups of different sizes: dimethylsilyl (DMS, R' = Me, R'' = H), trimethylsilyl (TMS, R' = R'' = Me), tert. butyldimethylsilyl (TBDMS, R' = Me, R'' = CMe3) and tert. butyldiphenylsilyl (TBDPS, R' = C6H5, R'' = CMe3). Dependences of the silicon and C-1 carbon chemical shifts on Hammett substituent constants are discussed. It is shown that substituent sensitivity of these chemical shifts is reduced by association with chloroform, the reduction being proportional to solvent accessible surface of the oxygen atom in the Si-O-C link.
dcterms:title
The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone
skos:prefLabel
The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone
skos:notation
RIV/67985858:_____/12:00375412!RIV13-GA0-67985858
n11:predkladatel
n12:ico%3A67985858
n3:aktivita
n8:P n8:Z
n3:aktivity
P(GA203/06/0738), P(IAA400720706), Z(AV0Z40720504)
n3:cisloPeriodika
2
n3:dodaniDat
n18:2013
n3:domaciTvurceVysledku
n10:6618669 n10:2658879 n10:1678671 n10:4244494 n10:5056063 n10:9958991
n3:druhVysledku
n5:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
133265
n3:idVysledku
RIV/67985858:_____/12:00375412
n3:jazykVysledku
n13:eng
n3:klicovaSlova
1H NMR; 13C NMR; 29Si NMR
n3:klicoveSlovo
n9:13C%20NMR n9:1H%20NMR n9:29Si%20NMR
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[2FDA51A85137]
n3:nazevZdroje
Magnetic Resonance in Chemistry
n3:obor
n17:CF
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
6
n3:projekt
n16:GA203%2F06%2F0738 n16:IAA400720706
n3:rokUplatneniVysledku
n18:2012
n3:svazekPeriodika
50
n3:tvurceVysledku
Blechta, Vratislav Soukupová, Ludmila Hetflejš, Jiří Schraml, Jan Šabata, Stanislav Sýkora, Jan
n3:wos
000301235100006
n3:zamer
n14:AV0Z40720504
s:issn
0749-1581
s:numberOfPages
7
n19:doi
10.1002/mrc.2860